package controller;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;
import model.Subject;
import model.User;
import service.ShoppingcartService;
import service.SubjectService;
import service.UserService;
import service.impl.ShoppingcartServiceImpl;
import service.impl.SubjectServiceImpl;
import service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@WebServlet("/shoppingcartInsert")
public class ShoppingcartInsertServlet extends HttpServlet {
    ShoppingcartService shoppingcartService=new ShoppingcartServiceImpl();
    UserService userService=new UserServiceImpl();
    SubjectService subjectService=new SubjectServiceImpl();
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //设置字符格式
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");

        //以字符流的形式接收数据
        BufferedReader reader = new BufferedReader(req.getReader());
        StringBuilder json = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            json.append(line);
        }
        //将接收的数据转换为json对象方便后面获取
        JSONObject jsonObject = JSON.parseObject(json.toString());

        //创建一个用来传数据的JSON对象
        JSONObject message = new JSONObject();

        //获取课程id
        String subjectId=jsonObject.getString("sid");
        long userId=jsonObject.getLong("uid");
        long sid=Long.parseLong(subjectId);

        List<Long>list=shoppingcartService.findSidByUid(userId);
        int flag=0;
        for(long i:list){
            if(sid==i){
                message.put("status",0);
                message.put("Msg", "购物车中已有该课程");
                resp.getWriter().write(message.toString());
                flag=1;
            }
        }
        if (flag==0&&shoppingcartService.insert(userId,subjectId)) {
            message.put("status", 1);
            message.put("Msg", "添加成功");
            resp.getWriter().write(message.toString());
        }


    }
}
